メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.867630948959 35.2444429980195, 136.867277418962 35.2444518396257, 136.867371568904 35.2434232522191, 136.867405574277 35.243086921301, 136.86769354231 35.2430827067461, 136.867667475213 35.2436887087911, 136.867630948959 35.2444429980195)) ^^http://www.opengis.net/ont/geosparql#wktLiteral